First decide if you should start a new topic or if there is already a topic you just want to reply to by adding your post.
Starting a New Topic
Browse to the topics on board where you wish to post and select the New Topic button near the top right-hand side of the board. This should take you to the Start new Topic screen. The two most important options are the Subject field and main Message field (not labeled as such, but obvious by its size). So enter your subject and start to type (or paste) your message in the main text area. If you're happy with your message, you can post it by selecting the Post button. Some forums may be configured to offer an additional Spell Check button alongside the Post and Preview options.
Replying to an existing Topic
Replying to a topic is nearly the same as starting a new topic,but first you go to one of the boards on the forum and then click on a topic in that board so you can read the posts. Now just click on the REPLY button at the top right-hand side. It is not necessary to enter anything in the Subject field unless you wish to change what's already there. type (or paste) your message in the main text area. If you're happy with your message, you can post it by selecting the Post button. Some forums may be configured to offer an additional Spell Check button alongside the Post and Preview options.
I hope this helps. If you need further help just let me know. We will do whatever is necessary to help you.
Hawk